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In one of your earlier posts, you suggested that the JBL could be prevented from "losing its place" if it was plugged into an active USB port while the batteries were changed.

I tried it, and it works!

I also tried removing the batteries, and turning the JBL ON while plugged into an active USB charging port. The JBL displayed the book I was reading ... without batteries. This would be a good "feature" if one wanted to read for an extended time, and not worry about rechargeable battery discharge, with subsequent, unanticipated JBL shutdown.

These two observations made me wonder if the JBL hardware contained a charging circuit, similar to the JB's ... would it be possible to charge rechargeable batteries in the JBL by plugging the device into an USB charging port, or would the connection damage the JBL in some way?

If the hardware guys designed the JBL for use with non-rechargeable batteries, they probably omitted the charging circuit. However, if the hardwar

In one of your earlier posts, you suggested that the JBL could be prevented from "losing its place" if it was plugged into an active USB port while the batteries were changed.

I tried it, and it works!

I also tried removing the batteries, and turning the JBL ON while plugged into an active USB charging port. The JBL displayed the book I was reading ... without batteries. This would be a good "feature" if one wanted to read for an extended time, and not worry about rechargeable battery discharge, with subsequent, unanticipated JBL shutdown.

These two observations made me wonder if the JBL hardware contained a charging circuit, similar to the JB's ... would it be possible to charge rechargeable batteries in the JBL by plugging the device into an USB charging port, or would the connection damage the JBL in some way?

If the hardware guys designed the JBL for use with non-rechargeable batteries, they probably omitted the charging circuit. However,

You cannot charge "non-rechargeable" batteries and if there was a charging circuit built in, the unit could be damaged as well as the client should non-rechargeable batteries be used when plugged in to a USB port. That is why it is up to the client to supply charged batteries. By forcing use of an external charger the client can have multiple sets of batteries on the ready.

Many house holds already have AA/AAA battery chargers for other devices.

One time use batteries can be used in a pinch when the re-chargeable ones are not ready.

Of course you could always continue to use "One Time use" batteries if that is what you want to do.

John

This message was edited 1 time. Last update was at 07/25/2010 13:53:46

You cannot charge "non-rechargeable" batteries and if there was a charging circuit built in, the unit could be damaged as well as the client should non-rechargeable batteries be used when plugged in to a USB port. That is why it is up to the client to supply charged batteries. By forcing use of an external charger the client can have multiple sets of batteries on the ready.

Many house holds already have AA/AAA battery chargers for other devices.

One time use batteries can be used in a pinch when the re-chargeable ones are not ready.

Of course you could always continue to use "One Time use" batteries if that is what you want to do.

John

Thanks for the feedback! I hear lithium batteries, although expensive, last quite a long time in the JBL whereas regular lithium batteries last for around 24 hours of continuous reading.